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There is no universal rule for the entropy of melting, in contrast to Trouton's rule. Yet a generic figure is 1kB per particle. Assuming this figure is exact, what is the molar enthalpy of melting of Argon (in kJ/mol), whose melting temperature is 83.85K?
If the pressure exerted by ozone,O3 , in the stratosphere is 3x10^-3 and the temperature is 246 K, how many ozone molecules are in a liter?
Elemental exonium (not a real element) consists of two major isotopes Abundance Mass 59% 94 amu 41% 112 amu What is the atomic weight for exonium? Answer in units of amu
Determine whether sodium monohydrogen phosphate (Na2HPO4) is neutral, basic, or acidic. First, what is its Ka when it acts as an acid? Second, what is its Kb when it acts as a base?
A typical deposit of cholesterol, C27H46O, in an artery has a mass of 3.90 mg. How many molecules of cholesterol are present in this deposit?
calculate the molecular mass of the nonionic sloutes. 6403 grams of solute in 3.90 x 10^2 grams of water raises the boiling point to 100.680 c.
Calculate the pH of a solution of CO2 at 38 degrees Celsius in equilibrium with the gas at a particular pressure of 3.55 atm.
A student wants to prepare a dilute solution of iron (III) solution, . The student is provided with a stock solution of 0.800 +/- 0.001 M and a 100.00 +/- 0.008 mL volume trick flask since the experiment trquires about 80 mL of the dilute iron (II..
A solution is made by mixing 506 mL of water and 198 mL ethanol. What is the concentration of ethanol in units of volume/volume percent.
Helium is compressed isothermally and reversibly at 100 celcius from a pressure of 2 to 10 bar
According to VSEPR theory, if there are five electron domains in the valence shell of an atom, what will be the expected electron domain geometry.
What temperature is needed to double the equilibrium constant from its value at 298 K? What temperature is needed to increase the equilibrium constant by a factor of 10? What if the standard enthalpy change were 20.0 kJ?
The length and width of the settling tanks (two rectangular units are desired with a length to width ratio of 3:1). Assume the average depth of the tank is 4m.
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